GPT-5.1 vs Mistral Large 3
OpenAI vs Mistral AI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 58.3)
- •Mistral Large 3 is cheaper ($0.50 vs $1.25 per 1M input)
- •GPT-5.1 is faster
- •GPT-5.1 has a larger context window (400K)
| GPT-5.1 | Mistral Large 3 | |
|---|---|---|
| Intelligence index | 89 | 58.3 |
| Developer | OpenAI | Mistral AI |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 262,144 tokens |
| Input price | $1.25 / 1M | $0.50 / 1M |
| Output price | $10.00 / 1M | $1.50 / 1M |
| Speed | 115 tok/s | 54 tok/s |
| Released | November 12, 2025 | December 2, 2025 |
| Parameters | — | 675B (41B active) |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5.1
Mistral Large 3
AIME 2025
94
38
GPQA Diamond
88.1
68
Humanity’s Last Exam
26.5
4.1
LiveCodeBench
86.8
46.5
MMLU-Pro
87
80.7